Mineralological Specimen

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Sunstone

Oligoclase (Plagioclase Feldspar Group) - (Ca, Na)(Al, Si)4O8

Green Quartz (Aventurine)

Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Garnet Schist

Garnetiferous Mica Schist

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Azurite Malachite (Mixed)

Azurite-Malachite; Azurite: Cu3(CO3)2(OH)2 / Malachite: Cu2CO3(OH)2

Mookaite Jasper

Silicon Dioxide (SiO2) with iron oxide impurities

Mica Schist

Mica Schist (KAl2(AlSi3O10)(OH)2 in Matrix)

Bloodstone (Heliotrope)

Silicon Dioxide (SiO2) with inclusions of Iron Oxide or Chlorite

Pyrite (Fool's Gold) in Matrix

Iron Sulfide (FeS2)

Sandstone (Ferruginous)

Arenite (with Goethite/Limonite cement)

Botryoidal Chalcedony

Silicon Dioxide (SiO2)

Desert Rose (Baryte or Selenite variant)

Barium Sulfate (BaSO4) or Gypsum (CaSO4·2H2O) with Sand inclusions

Banded Calcite (Mexican Onyx)

Calcite (Calcium Carbonate, CaCO3)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Fuchsite in Quartz

K(Al,Cr)2(AlSi3O10)(OH)2 in SiO2

Optical Calcite (Iceland Spar)

Calcite (Calcium Carbonate, CaCO3)

Limonite (Iron Stone/Goethite)

Limonite (mixture of hydrated iron oxides, primarily Goethite: α-FeO(OH))

Limonite (with Pyrite)

Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O

Sunstone

Plagioclase Feldspar (Na, Ca)(Al, Si)4O8 with Hematite or Copper inclusions

Carnelian

Carnelian (SiO2, Silicon Dioxide with Iron Oxide impurities)

Fuchsite

K(Al,Cr)2(AlSi3O10)(OH)2 (Chromium-rich Muscovite)

Ruby in Fuchsite (often sold as Ruby in Zoisite)

Corundum (Al2O3) in Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

Mica Schist

Mica Schist (primarily Muscovite and/or Biotite composition)

Obsidian (worked into an arrowhead profile)

Obsidian (volcanic glass), primarily SiO2 (Silicon Dioxide)

Chert (often called Jasper or River Rock)

Chert (SiO2)

Yellow Jasper (Limonite-stained Chert)

Silicon Dioxide (SiO2) with Limonite/Goethite inclusions

Gold Ore in Matrix

Native Gold (Au) in Quartz/Host Rock

Sandstone (Ferruginous)

Arenite (with Iron Oxides)

Riverstone Quartzite (Water-worn Siltstone/Quartzite)

Metamorphosed Quartz-rich Arenite (SiO2)

Chert (specifically Agate/Jasper variety)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Ferruginous Quartz (River Pebble)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Jasper

Jasper (SiO2 plus impurities)

Lunar Highlands Breccia (Meteorite)

Lunar Feldspathic Breccia

Chalcedony (Common Opal or Agate variant)

Silicon Dioxide (SiO₂)

Rough Corundum (likely Sapphire/Zircon-bearing)

Aluminium Oxide (Al2O3)

Jasper (Green variety)

Silicon Dioxide (SiO₂)

Gold (in Opaque Matrix/Jewelry)

Native Gold (Au)

Milky Quartz Pebble (Tumbled Quartzite)

Silicon Dioxide (SiO2)

Banded Chert

Microcrystalline Quartz (SiO2)

Jasper (Banded Argillite/Chert mix)

Silicon Dioxide (SiO2) with iron oxide inclusions